A description is given of a method and apparatus for determining the shear modulus G′ and mechanical loss factor tan δmech in polymer specimens using free torsional vibrations. The characteristic dependences of the shear modulus G′ (λ) and loss factor tan δ(λ) on the relative elongation are presented for low-density polyethylene at a temperature of 20°C and a frequency of 2 Hz.
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Manin, V.N., Bykov, V.A. & Dzhaborov, T. Method and apparatus for determining the shear modulus and mechanical loss factor of polymeric specimens in uniaxial tension. Polymer Mechanics 9, 160–162 (1973). https://doi.org/10.1007/BF00856032
- Shear Modulus
- Uniaxial Tension
- Loss Factor